x86: Also pass -mno-avx to sw-1.c for ia32

Also pass -mno-avx to sw-1.c for ia32 since copying data with YMM or ZMM
registers disables shrink-wrapping when the second argument is passed on
stack.

	* gcc.target/i386/sw-1.c: Also pass -mno-avx for ia32.

gcc/testsuite/gcc.target/i386/sw-1.c

@@ -1,5 +1,6 @@
 /* { dg-do compile } */
 /* { dg-options "-O2 -mtune=generic -fshrink-wrap -fdump-rtl-pro_and_epilogue" } */
+/* { dg-additional-options "-mno-avx" { target ia32 } } */
 /* { dg-skip-if "No shrink-wrapping preformed" { x86_64-*-mingw* } } */
 
 #include <string.h>